Triperylene Hexaimides Based All‐Small‐Molecule Solar Cells with an Efficiency over 6% and Open Circuit Voltage of 1.04 V

A small molecule DRCN5T as the donor with the of 1.60 eV, and a 3D perylene diimide as electronic acceptor are used to fabricate non-fullerene all-small-molecule solar cells. Upon thermal annealing, the efficiency of the device is enhanced from 0.47% to 6.16% with a high Voc of 1.04 V and a small energy loss of 0.56 eV.